Demos!

Demo #1 Decomposition "Volcano"
Ammonium Dichromate decomposition with heat
(NH4)2Cr2O7(s) --> Cr2O3(s) + N2(g) + 4H2O(g)




Demo #2 Redox/ combustion
Sodium chlorate and Haribo Gummy bear (sugar)

two steps:
2NaClO3(l) → 2NaCl(s) + 3O2(g)

Oxygen then reacts with sugar (C12H22O11)...
C12H22O11(s) + 12O2(g) → 12CO2(g) + 11H2O(l) + heat 5650 kJ/mol



Demo #3 Precipitation
Fe(NO3)3(aq) + 3NaOH (aq) --> Fe(OH)3(s) + 3NaNO3(aq)


CoCl2(aq) + Ca(OH)2(aq) --> Co(OH)2(s) + CaCl2(aq)


K2CrO4(aq) + Pb(O2CCH3)2(aq) --> PbCrO4(s) + 2KO2CCH3(aq)

Demo #4-6Density

Oil:Water: Dye

"Water and different temperatures"

Density Column


Sublimation of I2

I2 (s) on hot plate	I2(g) Trapped in beaker "sublimation"	I2(s) recrystallized "deposition"

Single Displacement/ Chemical Change
2AgNO3(aq) + Cu(s) --> Cu(NO3)2(aq) + 2Ag(s)